package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private FlavorMapper flavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishService dishService;
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 新增彩屏和对应的口味
     * @param dishDTO
     */
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);
        Long disId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors.size()>0&&flavors!=null){
            flavors.forEach(flavor->{flavor.setDishId(disId);});
            //像口味表插入n条数据
            flavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> dishVOS=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(dishVOS.getTotal(),dishVOS.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否可以被删除--是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断档期那菜品是否可以被删除--是否存在被套餐管关联
        List<Long> setmealIds=setmealDishMapper.getSetmealIdByDishId(ids);
        if(setmealIds!=null&&setmealIds.size()!=0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

//        for (Long id : ids) {
//            //删除菜品表中的菜品数据
//            dishMapper.deleteById(id);
//            //删除口味表中的口味数据
//            flavorMapper.deleteByDishId(id);
//        }
        //根据菜品id集合批量删除菜品税局
        dishMapper.deleteByIds(ids);
        //根据菜品id集合批量删除口味数据
        flavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据id查询菜品
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询口味
        List<DishFlavor> dishFlavors=flavorMapper.getByDishId(id);
        //将查询到的数据封装到DishVO
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品表信息
        dishMapper.update(dish);
        //删除原有的口味表信息
        flavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()!=0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            flavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> getByCategoryId(Long categoryId) {
        Dish dish=Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        List<Dish> dishes=dishMapper.getByCategoryId(dish);
        return dishes;
    }

    /**
     * 菜品起售、停售
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Dish dish=Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
        if(status==StatusConstant.DISABLE){
            List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishId(Collections.singletonList(id));
            if (setmealIds!=null&&setmealIds.size()!=0){
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal=Setmeal.builder()
                            .id(id)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }
        }
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getByCategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = flavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
